We use Mimaki equipment here...
If you're looking for one versatile enough for both kiss cutting and die cutting, go for the FX series. The SR & AR series are pretty low grade, mostly plastic. One we have is an SR-III, it's a cheap utility machine, kiss cuts good, but it's not very robust. Good for a backup, or just as a 2nd machine. The AR series is the next step up, still a lot of plastic where you don't want it to be.
My main one is an old FX series, it's built like a tank, over 18 years old, still accurate, and still kicks butt. The FX has dual cutting strips and blade holder locations, the 2nd ones are just for die cutting. I don't do much die cutting, but when I do it's so nice to not tear up cutting strips & blades. Only parts ever purchased for it were blades, blade holders, a couple of cutting strip replacements, and one set of replacement rollers... In 18 years! They're well worth the added cost in my opinion. If you wanna stay Mimaki, this is their best.